CPC H02K 1/02 (2013.01) [H02K 7/09 (2013.01); H02K 15/02 (2013.01); H02K 1/17 (2013.01); H02K 1/27 (2013.01); H02K 2201/09 (2013.01)] | 15 Claims |
1. A lamination stack for use in a rotating electrical machine, the lamination stack being formed by a method comprising:
providing a plurality of sheets of ferritic material, each of the sheets having a first side and a second side and a thickness from the first side to the second side, the first and second sides having asperities each having a height of about two microns;
coating at least one side of each sheet with a chemically protective electrically insulating material;
stacking the coated sheets;
compressing the stack of the coated sheets;
heating the compressed stack of coated sheets at a temperature above a melting temperature of the insulating material; and
cooling the compressed stack.
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